I'm working through my catalog of photos, hoping this time to finally get it right. One thing I have an issue with in XnView MP is the Category Sets - Assigned interface. I would prefer if it showed me the categories assigned in a tree rather than an alphabetical series of labels/buttons. Since some of my photos already have categories from other photo-managers it's tough to know if the category that is there is the correct one (in the correct hierarchy) or an old one without a hierarchy.

Also, since there are issues with XnView MP applying parent categories consistently it would also help double-check that all categories are properly assigned.

Thanks,

Version 0.72 x64 (Dec 19 2014) on Arch Linux

Headed for the second star to the right and straight on 'til morning...

+1 for showing the full path of set categories instead of categories in alphabetic order.
Vertébré|Mammifère|Périssodactyle|Equidé|Cheval instead of Cheval Equidé Mammifère Périssodactyle Vertébré mixed with other categories.

I'm also missing the option to have all parent categories selected automatically when I select the leaf one (Cheval in the following example):
Vertébré
Mammifère
Périssodactyle
Equidé
Cheval

The option "Don't export" is then used to not export the root ones if necessary while I can still use Vertébré as a filter.